505726.fig.001
Figure 1: The model domains and arrangement of nesting for the numerical experiments: (a) nested domains for WRF model and (b) an illustration that the innermost domain covers the State of Arizona. The arrows indicate the prevailing directions of moisture fluxes into Arizona in wintertime [18]. The topographic map is taken from Arizona Geographic Alliance, Arizona State University (http://geoalliance.asu.edu/azga/).